The lizard in the article is a monitor lizard, genus Varanus, which includes all species of monitor lizards. I wouldn't believe anything the article says. It says the lizard is 6 ft long and weighs 100 pounds. Since the tail is at least half the length of a lizard, that would mean a 3-foot body, maybe 20 pounds or so.
Goanna is an Australian term for any monitor lizard, and is believed to be derived from a mispronunciation of iguana, an unrelated family of lizards.